Merge 1.70 into proxmox/bookworm

[rustc.git] / tests / ui / const-generics / transmute-fail.rs

diff --git a/tests/ui/const-generics/transmute-fail.rs b/tests/ui/const-generics/transmute-fail.rs
new file mode 100644 (file)
index 0000000..d7bf1b4
--- /dev/null
+++ b/tests/ui/const-generics/transmute-fail.rs
@@ -0,0 +1,35 @@
+#![feature(transmute_generic_consts)]
+#![feature(generic_const_exprs)]
+#![allow(incomplete_features)]
+
+fn foo<const W: usize, const H: usize>(v: [[u32;H+1]; W]) -> [[u32; W+1]; H] {
+  unsafe {
+    std::mem::transmute(v)
+    //~^ ERROR cannot transmute
+  }
+}
+
+fn bar<const W: bool, const H: usize>(v: [[u32; H]; W]) -> [[u32; W]; H] {
+  //~^ ERROR mismatched types
+  //~| ERROR mismatched types
+  unsafe {
+    std::mem::transmute(v)
+    //~^ ERROR cannot transmute between types
+  }
+}
+
+fn baz<const W: usize, const H: usize>(v: [[u32; H]; W]) -> [u32; W * H * H] {
+  unsafe {
+    std::mem::transmute(v)
+    //~^ ERROR cannot transmute
+  }
+}
+
+fn overflow(v: [[[u32; 8888888]; 9999999]; 777777777]) -> [[[u32; 9999999]; 777777777]; 8888888] {
+  unsafe {
+    std::mem::transmute(v)
+    //~^ ERROR cannot transmute
+  }
+}
+
+fn main() {}